Hand-brake mechanism for railroad cars



Y. MIYASAKI HAND BRAKE MECHANISM FOR RAILROAQ C ARS Filed Ma h 19, 1927 SSheets-Sheet 1 yusrre Mz'yasarn' IN VEN TOR.

A TTORNEYS.

Dec. 13, 1927.

Y. MIYASAKI HAND BRAKE MECHANISM FOR RAILROAD CARS S Sheets-Sheet 2 Filed March 19, 1927 y 1:5](6 Miyasam;

I N VEN TOR.

A TTORN E YS.

Dec. 13, 1927. Y. MIYASAKI HAND BRAKE MECHANISM FOR RAiLROAD CARE;

Fiied March 1927 AM i 3 Sheets-Sheet s yusxe Miyasarti INVENTOR.

ATTORNEYS.

Patented Dec. 13, 1927.

YUSKE MIYASAKI, OF KANSAS CITY, MISSOURI.

HAND'BRAKE MECHANISM FOR RAILROAD CARS.

Application filed March 19, 1927. Serial No. 176,796.

This invention relates to hand brake mechanisms for railroad cars and it is an ob ect of the invention to provide a mechanism of this kind constructed in a manner to effectively protect the same against the elements and particularly to prevent water entering the spaces between the parts comprised therein which would be likely to freeze and thereby materially interfere with the operation of the mechanism.

Another object of the invention is to pro vide a mechanism of this kind including a chain bracket to take up slack in the chain and to eliminate a bolt or pin which is usually required to prevent the chain from becoming disengaged from the bracket.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved hand brake mechanism for a railroad car whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invent-ion may be the better understood. I will now proceed to describe the same with reference to the accompanying drawings, wherein z- Figure 1 is a view in front elevation illustrating a hand brake mechanism constructed in accordance with an embodiment of my invention with the associated end sill indicated by broken lines;

Figure 2 is a vertical sectional view taken substantially on the line 2-2 of Figure 1 with certain of the parts in elevation and other associated parts diagrammatically in dic ated by broken lines;

Figure 3 is an enlarged detailed sectional view taken substantially on the line 33 of Figure 2;

Figure 4 is a detailed sectional view taken on the line 44 of Figure 7 illustrating one of the supporting brackets for the gear as herein disclosed;

Figure 5 is an enlarged fragmentary elevational view of the chain bracket as herein employed and the parts directly associated therewith;

Figure 6 is a view in top plan of the structure illustrated in Figure 5 with the winding shaft in section;

Figure 7 is a top plan view illustrating the hand brake mechanism.

As disclosed in the accompanying drawings, H denotes a housing provided to one side thereof with a supplemental housing S one in communication with the other, the bottom of the housing H being open while the bottom of the housing S is closed b a plate 1 provided with a bearing 2 for a tu ular trunnion 3 of a pinion 4.

The pinion 4 is provided therethrough with a square opening 5 in which is closely engaged the lower end portion of a brake shaft 6. The shaft 6 rests on the inwardly disposed lugs '7 extendingwithin the bore of the trunnion 3, said shaft 6 having its in serted end continued by a cylindrical extension 8 extending below the bottom plate 1 of the supplemental housing S. Disposed through said extended portion of the cylindrical extension 8 is a cotter pin 9 or the like whereby rising of the brake shaft 6 is prevented.

Between the lugs comparatively large openings 10 are provided so that water entering around the brake shaft 6 will be drained effectively, minimizing overflowing of water over the top of the pinion 4.

The upper end portion of the opening 5 in the pinion 4 is enlarged, as at 11, to receive the lower end portion of a bushing 12 which is snugly engaged with the lower portion of the brake shaft 6. The enlarged portion 11 of the opening 5 is tapered down wardly so that water will not escape over the top of the pinion 4. The lower end of the bushing 12 is provided with a tapered boss 14 which extends within the enlarged portion llof the opening 5, said boss 14 being of such configuration with respect to the tapered portion 11 to provide a clearance 15 so that water will not be drawn up to the top of the pinion 4 by capillary action. o

The upper portion of the bushing 12 has integrally formed therewith a cap 16 of inyerted dish shape'and which overlaps the upper portion of the upstanding trunnion 17 carried by the housing S. A clearance 18 is provided between the cap 16 and the trunnion 17'to minimize frictional resistance as the bushing 12 together with the cap 16 are rotated with the brake shaft 6.

A bracket 19 is mounted adjacent to the supplemental housing '8 and overlies the cap 16 to prevent the bushing 12 and also the pinion 4 fromrising.

Arranged within the housing H is a gear 20 meshing with the pinion 4. The opening between the housings H andSis-ofi a height to readily permit the application of the pinion 4 in applied or working position beforethe'gear 20 is placed in assembly.

The top plate 21 of thehous-ihgH is provided with a depending tubular bearingor trunnion 22 in which is-receivedthe upper gear is restedupon'the brackets 26. These brackets 26 are 'secured'at desiredipoints to the side wall'27of the housing H to provide support: for'the gear 20 when the gear 20' is detached from the windingshaft 24 or when the supporting bracket'28 for the lower end portion of the shaft 24is removed. It is to be understood, however. that in the working assembly the gear 20 is free of'contact with thebrackets 26.

When the gear 20 isresting on the brackets 26Lthe upper edge ofthe flange 25 is above the lower endof the trunnion or'bearing'22 so that the gear 20'will not move away from the pinion 4a distance 'any greater than the clearance space between the trunnion orbearing 22' and the flange 25. By this it will be readily understood that the bearing or trunnion 22 serves as a stop to hold the gear 20 in mesh with the'pinion 4.

When the brackets 26 are removed and the gear 20 lowered until the lower edge of the gear rim touches the top: of the plate 1, the top of the flange 25 will clear the lower endof the bearing 01' trunnion 22 and thus permitting the ready removal of the gear 20 from within the housing H. It is to be noted that the interior diameter of the housing H is such. with respect: to the diameter of the gear 20 to provide suiiicient space-29to permit the requisite lateral movement of the gear 20 for dismantling or assembling the same.

In working assembly the flange 25 is free of contact with thebearing or trunnion 22.

Fixed to the winding shaft 24 in close proximity to the gear 20 is a sleeve 30 come prised. in the chainbracket B and extending outwardly from this sleeve 30 is an arm 31 withwhich is engaged an end link 32 of'the winding chain C. The link 32"that connects to the end'link 32 restsagainst a depending wall 33" carried by the sleeve 30 so that the distance from the center of the winding shaft- 24 to the center line of the link 32' will be increasedbythe thickness of the wall 33 comparedwith the link 32"resting direct-- l'y. on the winding shaft 24, thus making itmore efficient to take up slack.

given tension in the chain.

The vertical wall 33 terminates inwardly of the wall of the sleeve 30 remote from the arm 31 so that the third end link 32 will clear the sleeve 30 to bring the succeeding link 32" in direct contact with the shaft 24 to develop a maximum pulling force in the chain O by. reducing to a minimum the distance from the center of the shaft 24 to the center link of-the link 32". By this attachment and arrangement of the chain with respect to the shaft 24, it is possibletotake up slack of the chain quickly and develop maximum pull. i V

The arm 31 is provided its outer end with an outstanding flange 34 terminating in aninwardly directed flange The arm 31 in a transverse direction is sloped toward the chain C so that said chain will clearthe lower edge of the sleeve 30 proper and also to bring the upper or high edge of the arm 31 close to the lower edge of the sleeve 30 proper to effect substantial connection between the arm 31 and the sleeve 30. The link 32 is loosely engaged with the arm 31.

For releasing the brake the winding shaft 24 is turned clockwise approximately one hundred and eighty degrees bringing the link 32 to the position illustrated in Figure 6. Although further rotation of the winding shaft is unnecessaryfor releasing the brake, it is to be expected that the winding shaft will be rotated farther on account of difficulty of observing the released position of the brakesystem from hand brake operating platform. Upon such farther rotation of the winding shaft, however, the link 32 will be brought into contact with, the flange 34 which will serve as a stop against farther rotation of the shaft 24, the flange 35 serving as a safety stop to prevent undue upward movement of the link 32 with respect to the flange 34.

The distance between the bottom of an end sill E and the chain '0 at its connection with ithe winding shaft 24 varies with the vertical location of the-chain for different types of cars. If standard pitch diameters of the pinion and gear are maintained, the size of the winding shaft 24, is limited to a certain diameter to develop a required pull in the chain, or the-maximum diameter of the winding shaft is fixed. When the diameter of the winding shaft is fixed, the length of the winding shaft between the bearings is also limited for, bending due to the Therefore, in case the brake chain islocated far below the bottom of the end sill E,.it is notalways possible to increase the length of the winding shaft 24 to the extent that the top 21 of the housing H will be secured directly to the underside of the end sill E on. account of the winding shaft being subjected to, bend ing beyond allowable fiber stress. If the housing H is provided with an extension'cast integral therewith to reach the underside of the end sill E for securing,diflerent patterns of housings'will b'e required for different types of cars. In order to enable theuse of a standard; pattern for thehousing an inverted U bracket 36 is employed interposed between the housing H and the end sill E so that the webs 37 of the bracket will be disposed longitudinally'ofthe car or 'in a general direction of pull of the chain C.

It is also to be noted that by ha-vingthe bearing 2 an integral part of the supplemental housing S, separate operations are eliminated for boring the pinion bearing and drilling of bolt holeswhich wouldbe required in case-a detachable lower pinion bearing was used. 1 From the, foregoing description it is thought to be obvious tha t ahand' brake mechanism for arailroad car constructed in accordance with my invention is particularly well adapted for use by'reason of the convenience andfacility with which itm'ay be assembled andoperated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for thisreason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out'my invention in claimed.

I claim:

1. A-hand brake mechanism comprising, in combination, a main housing, a supplemental housing in communication therewith, a gear within the main housing,a winding shaft rotating with the gear, a'pinion with in the supplemental housing meshing with the gear, a brake shaft 'engageable with the pinion for rotating the same, the main hous ing having a depending-bearing in which an end portion of the winding shaftis engaged, the gear having an outstanding annular'flange surrounding said bearing when the gear'is'in working assembly, a bearing for the winding shaft exteriorly of the housing, means for supporting the gear within the housing when said exterior bearing is removed, said annular'fiange coacting with the bearing of the housing for maintaining the gear and pinion in mesh when the winding shaft is free of the gear.

2. A hand brake mechanism comprising, in combination, a main housing, a supplemental housing in communication therewith, a gear within the main housing, a winding shaft rotating with the gear, a pinion within the supplemental housing meshing with the gear, a brake shaft engageable with the pinion for rotating the same, the main housing having a depending bearing in which an end portion of the winding shaft is engaged, the gear having an outstanding annular practice except as hereinafter flange surrounding said bearing when the gear is in working assembly, a bearing for the winding shaft exteriorly of the housing, means for supporting the gear within the housing when said exterior bearing is re moved, said annular flange coacting with the bearing of the housing for maintaining the gear and pinion in mesh when the winding shaft is free of the gear, the communication between the housings being of a height to permit insertion of the pinion within the supplemental housing from the main hous ing, the pinion having a trunnion engaging the bearing in the supplemental housing.

3 A hand brake-mechanism comprising, incombination, amain housing, a supplemental housing in communication therewith, a gear within the main housing, a winding shaftrotating withthe gear, a pinion within the supplemental housing meshing with the gear, a brake shaft engageable with the pinion forrotating thesame, the main housing having a depending bearing in which an end portion of the winding shaft'is engaged, the gear having an outstanding annular flange surrounding said bearing when the gear is in working assembly, a bearing for the winding shaft exteriorly of the housing, means for supporting the gear within the-housing when sa-id'exterior bearing is removed, said annular flange coacting with the bearing of the housing for maintaining the gear and pinion inmesh when the winding shaft is free of the gear, the communication between the housings being of a heightto permit the gear to be lowered'sufticient to free the annular flange of the gear from the bearing of the main housing in applying or removing the gear after said supporting means for the gear has been removed.

4. A hand brake mechanism comprising, in combination, a housing, a gear arranged therein, a winding shaft adapted to be rotated by the gear, a pinion within the housing meshing with the gear, said housing having a plate underlying'the pinion, said plate being provided with a bearing, said pinion having a trunnion engageable with the bearing of the plate, said pinion having an opening disposed therethrough and through the trunnion, the wall of the opening within the trunnion being provided with inwardly disposed lugs, a brake shaft having a porpinion having a trunnion engageablewith the bearing of the plate, said pinion having an opening disposed therethrough and through the trunnion, said openingbeing circular in cross section, the wall of the opening within the trunnion being provided witliiinwardly disposed lugs, a brake shaft having a portion closely engageable within the opening of the pinion and having a reduced extension insertible through the trunnion, the lugs providing spaced drain ing openings around the extension, and a sleeve closely engaged with the brake shaft above the pinion and resting thereon.

6. A hand brake mechanism comprising, in. combination, a housing, a gear arranged therein, a winding shaft adapted to be rotated by the gear, a pinion within the housing meshing with the gear, said housing having a plate underlying the pinion, said plate being provided with a bearing, said pinion having a trunnion engageable with the bearing of the plate,said pinion having an opening disposed therethrough and through vthe trunnion, said opening being circular in .cross section, the wall of .the opening within the trunnion being provided with inwardly disposed lugs, a brake shaft having a portion closely engageable within the opening of the pinion and having ,a reduced extension insertible through the trunnion, the lugs providing spaced draining openings around theextension, and a sleeve closely engaged with the brake shaft above the pinion and resting thereon, the meeting end portions of the sleeve and pinion interfitting.

7. A hand brake mechanism comprising, in combination, a housing, a gear arranged therein, a winding shaft adapted to be rotated by the gear, a pinion within the housing meshing with the gear, said housing having a plate underlying the pinion, said plate being provided with a. bearing, said pinion having a trunnion e'ngageable with the bearing of the plate, said pinion having an opening disposed therethrough and through the trunnion, said opening being circular in cross section, the wall of the opening within the trunnion being provided with inwardly disposed lugs, a brake shaft duced [extension insertible. through the trunnion,,the lugs providing spaced draining openingsaround the-extension, and a sleeve closely engaged T with the brake shaft above the pinion and resting thereon, the meeting end portions of the sleeve and pinion interfittingwith a clearance space between said interfitting portions.

8. A hand brake mechanism comprising, in combination, a housing, a gear arranged therein,'a winding shaft adapted to be rotated by the gear, a pinion within the house ing meshing with the gear, said housing having a plate underlying. the, pinion, said plate being provided with a vbearing, said pinion having a trunnion engageable with the bearing of the plate,ysaid pinion having an opening disposed 1 therethrough and through the trunnion, saidJopening being circular in cross section, the wall of the opening within the'trunnion being provided with inwardly 'disposed,lugs,ia brake shaft having a portion closely engageable within the opening of the pinion and having a reduced extension insertible through the trunnion, the lugs providing spaced draining openings around the. extension, and a, sleeve closely engaged with the brakevshaft above the pinion and resting thereon, the outer end portion of t-he'sleeve being provided with a dish-like cap, the housing beingprovided with a tubular trunnion through which the'sleeve is directed and which the cap overlaps." I

9. A hand brake mechanism comprising, in combination, a housing, a gear arranged therein, a winding shaft, a pinion within the housing meshing with the gear, a brake shaft engageable with the pinion, a sleeve closely engaged with the brake shaft above the pinion and unintegral with the pinion, said sleeve and pinion provided with means to prevent water draining around the brake shaft from entering into the bearings and spaces between the pinion and gear teeth.

In testimony whereof I hereunto afiix my signature. 3

a YUSKE MIYASAKI. 

